(function() {
  var dot = document.getElementById('sse-dot');
  var es;

  function connect() {
    es = new EventSource('/events');
    es.addEventListener('hello', function() {
      dot.className = 'led led-green';
    });
    es.addEventListener('host.state_changed', function() {
      window.location.reload();
    });
    es.addEventListener('activity.logged', function(e) {
      var data;
      try { data = JSON.parse(e.data); } catch(_) { return; }
      var logDiv = document.getElementById('activity-log');
      if (!logDiv) return;
      var hostId = logDiv.getAttribute('data-host-id');
      var opId = logDiv.getAttribute('data-operation-id');
      if (opId) {
        if (String(data.operation_id) !== opId) return;
      } else if (hostId) {
        if (String(data.host_id) !== hostId) return;
      } else { return; }
      var empty = logDiv.querySelector('.empty');
      if (empty) empty.remove();
      var entry = document.createElement('div');
      entry.className = 'log-entry log-' + data.level;
      var t = new Date(data.created_at);
      var ts = t.getHours().toString().padStart(2,'0') + ':' + t.getMinutes().toString().padStart(2,'0');
      entry.innerHTML = '<span class="log-time">' + ts + '</span>' +
        '<span class="log-source">' + data.source + '</span>' +
        '<span class="log-msg">' + data.message + '</span>';
      logDiv.insertBefore(entry, logDiv.firstChild);
    });
    es.onerror = function() {
      dot.className = 'led led-red';
      es.close();
      setTimeout(connect, 3000);
    };
  }

  connect();
})();

(function() {
  var form = document.getElementById('upload-form');
  if (!form) return;

  var uploadId = 'upload-' + Date.now() + '-' + Math.random().toString(36).substr(2, 9);
  document.getElementById('upload-id').value = uploadId;

  var progressDiv = document.getElementById('upload-progress');
  var progressFill = document.getElementById('progress-fill');
  var progressTitle = document.getElementById('progress-title');
  var progressText = document.getElementById('progress-text');
  var progressDetail = document.getElementById('progress-detail');

  var uploadES = new EventSource('/events');
  uploadES.addEventListener('image.upload_progress', function(e) {
    var data;
    try { data = JSON.parse(e.data); } catch(_) { return; }
    if (data.upload_id !== uploadId) return;

    progressText.textContent = data.detail;
    if (data.stage === 'parsing' || data.stage === 'extracting') {
      progressTitle.textContent = 'Extracting boot files...';
      progressDetail.textContent = 'Processing ISO on server...';
    }
    if (data.stage === 'complete') {
      progressFill.classList.add('complete');
      progressTitle.textContent = 'Complete';
      progressDetail.textContent = 'Redirecting...';
    }
  });

  form.addEventListener('submit', function(e) {
    e.preventDefault();

    if (!form.checkValidity()) {
      form.reportValidity();
      return;
    }

    form.style.display = 'none';
    progressDiv.style.display = 'block';

    var formData = new FormData(form);
    var xhr = new XMLHttpRequest();

    xhr.upload.addEventListener('progress', function(ev) {
      if (ev.lengthComputable) {
        var pct = Math.round((ev.loaded / ev.total) * 100);
        progressFill.style.width = pct + '%';
        var mb = (ev.loaded / (1024 * 1024)).toFixed(1);
        var totalMb = (ev.total / (1024 * 1024)).toFixed(1);
        progressText.textContent = 'Uploading: ' + mb + ' / ' + totalMb + ' MB (' + pct + '%)';
      }
    });

    xhr.upload.addEventListener('load', function() {
      progressTitle.textContent = 'Processing ISO...';
      progressText.textContent = 'Upload complete. Extracting kernel and initrd...';
      progressDetail.textContent = 'This may take a minute...';
    });

    xhr.addEventListener('load', function() {
      uploadES.close();
      var resp;
      try { resp = JSON.parse(xhr.responseText); } catch(_) { resp = {}; }
      if (xhr.status >= 200 && xhr.status < 300 && resp.ok) {
        window.location.href = '/images';
      } else {
        progressDiv.style.display = 'none';
        form.style.display = 'block';
        showUploadError(resp.error || 'Upload failed');
      }
    });

    xhr.addEventListener('error', function() {
      uploadES.close();
      progressDiv.style.display = 'none';
      form.style.display = 'block';
      showUploadError('Network error during upload');
    });

    xhr.open('POST', '/images/upload');
    xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
    xhr.send(formData);
  });

  function showUploadError(msg) {
    var errDiv = form.parentNode.querySelector('.error');
    if (!errDiv) {
      errDiv = document.createElement('div');
      errDiv.className = 'error';
      form.parentNode.insertBefore(errDiv, form);
    }
    errDiv.textContent = msg;
  }
})();